The bug
If commands returns multiple lines of feedback the following lines have an indentation. This is not the case for the commands /whitelist list and /banlist.
How to reproduce
Add yourself to the whitelist
/whitelist add <player>List all whitelisted players
/whitelist list→ Your username is not indented
The reason
The following is based on decompiled version of Minecraft 1.9 using MCP 9.24 beta. All method and class names are the names used in the decompiled version.
The according methods send two chat messages. The first one is the headline "There are X (out of X seen) whitelisted players:" and the second one contains all the whitelisted players.
Is this still an issue in the latest snapshot 16w44a? If so please update the affected versions.
This is an automated comment on any open or reopened issue with out-of-date affected versions.